Tractor-plow.



P, E. HOLT.

TRACTOR PLOW.

APPLICATION FILED 0cT.16, 1912.

Patented Apr. 11, 1916.

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P. E. HOLT.

TRACTOR PLOW.

APPLICATION FILED OCT- [6, 1912.

1,17 9,183. I Patented Apr. 11, 1916.

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PLINY E. HOLT, F PIEDMONT, CALIFORNIA.

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To all whom it may concern Be it known that I LPLINY E. HOLT, a citizenof the United gtates, and a resident of Piedmont, Alameda county, Stateof Cal ifornia, haveinvented new and useful Improvements inTractor-Flows, of which the plan view of the same.

following is a specification.

This invention relates to improvements in traction plows and moreparticularly to raising and lowering mechanisms therefor.

The objects sought to be accomplished are toprovide a gang plow adaptedto be directly coupled to an auto-tractor and provided with a powerraising and lowering mechanism deriving its power from the auto-tractorand under the immediate control of the tractor operator.

Broadly stated, the invention consists of a plow frame carrying one'ormore plows, a supporting mechanism pivoted to the plow frame, andraising and lowering mechanisms interposed between the supporting mechanisms and the plow frame; and transm1ssion mechanisms interposed betweenthe raising and lowering mechanism and the prime mover of the tractor bywhich the plows are mechanically raised and lowered.

In the drawings: Figure 1 is a side elevation of a gang plow constructedin accordance with this invention attached to an auto tractor of thecaterpillar type. Fig. 2 1s a Fig. 3 is a detail plan view from aboveofthe raising and lowering mechanism of the plow. F g. 1s a sideelevation partially in cross section, taken on the line d--% of Fig. 3.Fig. 5 is a detail in plan illustrating the manner of hitching the plowframe to the tractor, also the manner of adjusting the gather of theplow.

In. detail the construction consists of themain frame 1 having thestandards] 2 upon which are mounted the plow body 3. "The forward end ofthe plow is attached to the steering truck by the draft bar 4 and thecoupling pin 5, engaging the coupling 6. The bolt 7 extending betweenthe plates 8 and 9 engages the coupling. The running nuts 10 on the:bolt provide vertical adjustment for the coupling. The forward end ofthe plow frame is thus carried and guided by the draw bar of thetractor, and the steering wheels or. The plow frame is supported by therollers l1 and 12 mounted upon the radius rods 7 13 that extend forwardand are pivoted in.

- Specification of Letters Batent.

Application filed october 16,

the block 14; attached to the front end of the I upon the .r tentea Apr.11,1916; 1912. Serial no. traces. I

plow frame.- The -major portion of the weight of the plow is carriedupon these "rollers. Rack bars 15 and 16 are pivoted hear these rollersand extend upward and engage the pinions l7 and 18 fixed on theshaft 19.This shaft is journaled in the base 20, mounted upon the plow frame.

The worm gear 21 is fixedv on a sleeve rotatable on the shaft 19 andenmeshed with the gear worm 22, fixed on the shaft 23.

This shaft 23 is journaled in the base'20 and provided with the frictionsocket 24. The clutch cone 25 is mounted upon a shaft 26 stepped into. arecess provided in the friction socket 24. The coneis adapted to bethrown into and out of frictional engagement with the socket 24. Thisclutch is" operated by the yoke 27 pivoted at 28 upon the base 20 andengaging the hub 29 of: the friction head.- The tumbling shaft 26 isprovided with a universal joint 30and the slip joint 31. A continuationof the shaft 26 is provided with the universal joint 32 near the pivotalengagement of the plow frame with the tractor draw-bar. From this pointthe shaft 26 continues forward, being mounted in suitable bearings fixeduponthe tractor frame. The shaft 26 receives its ro tation through thegear '33 splined thereon and enmeshed with the pinion 35 fixed upon thetransmission shaft 36 geared to the prime mover.- Thus rotation istransmitted from the prime mover 37 of. the tractor to the raising and1I lowering mechanism mounted p ow. V P The shaft 19 is provided withthe. jaw

clutch 38 splined thereon and controlled by i the yoke 39, pivoted uponthe base 20 a'nd manually operated by the crank lever 40 that isconnected to the link 41. Manipula= tion of the lever 40 throws theclutch cone 25 controlled bythe yoke 2'? into and out of engagement. Thefriction clutch and the jaw clutch 38 are independently operated by theconnecting link 41, the slot 42 permitting the withdrawal of thefriction clutch prior. to the disengagement of the jaw clutch, thelatter being engaged by the spring 43. With the friction clutchdisengaged and the jaw clutch engaged the plow frame'is locked at thedesired height by theirreversibilitg of thewormgear, The rotation of theshe t 19 causes thegpinions 17 and 18 to climb up the racks 15-and16lifting the plowframe andtheplov iscleanof the ground or the desired Iheight, throwing the support upon the rollers 11 and 12 and the tractorfor transportation. The plow is dropped into operative position bywithdrawing the clutch 38.

The suction of the plow bodies is adjusted by the running nuts 10raising or lowering the front of the plow frame. The gather of the plowis controlled by the adjusting slots 4:4: in the plates 8 and 9, thebolt 45 looking the lateral adjustment of the front of the plow frame.

By this close coupling of the plow directly to the tractor, a verycompact combination results, making it possible to plow close up infence corners or restricted spaces. It is also possible to a limitedextent to back up such an outfit which is not common in this art. All ofthe control mechanisms of both the plow and the tractor are concentratedwithin easy reach of a single operator who is capable of controllingevery operation of .the combination with case.

It will be noted that the whole plow frame trails froma flexibleconnection with rear steering truck, but is susceptible of adjustment toregulate bothsuction and gather and at the same time the powerconnections for raising the plow frame adapt and adj ustthemselves toboth the relative movements of the plow frame and steering truck and. tothe relative movements of the steering truck and body of the tractorcarrying the engine. In other words the arrangement is such that theadvantages of a rear steering tractor and trailing plow arrangement aresecured in connection. with the advantages of a power connection forraising the plow frame.

While. the conventional type of mold board plow has been illustrated anddescribed, disk plows or other types of implements coming within theapplication of this invention may be substitutedtherefor.

I-Iaving thus described this invention, what is claimed and desired tobe secured by Letters Patent is:

1. In a traction plow, the combination with a tractorframe and a primemover carried thereby, of a plow frame, a steering truck interposedbetween the tractor frame and the plow frame, raising and loweringmechanism carried by the plow frame, and means for operating saidraising and lowering mechanism from the prime mover carried by thetractor frame, including a power connection between said device and saidprime mover.

2. In a traction plow, the combination with a tractor frame and a primemover carried thereby, of a plow frame, a steering truck interposedbetween the tractor frame and the plow frame, raising and loweringmechanism carried by the plow frame, and means for operating saidraising and lowering mechanism from the prime mover carried by thetractor frame including a power memes connection between said mechanismand said prime mover and responsive to relative lateral angularrelations assumed by the several frames.

3. In a traction plow, the combination with a tractor frame and a primemover carried thereby, of a plow frame, a steering truck interposedbetween the tractor frame and the plow frame, raising and loweringmechanism carried by the plow frame and means for operating saidmechanism from the prime mover carried by the tractor frame including aloose power connection between the three frames responsive to relativeangular positions assumed by said frames.

4:. In a traction plow, the combination with a tractor frame and a primemover carried thereby, of a plow frame, a steering truck interposedbetween the tractor frame and the plow frame, raising and loweringmechanism carried by the plow frame, and means for operating saidraising and lowering mechanism from the prime mover carried by thetractor frame including a drive shaft extending through and supported bythe steering truck. I

5. In a traction plow, the combination with the tractor frame carryingthe engine, a rear steering truck pivotally connected.

with the tractor frame on a vertical axis,

steering wheels pivotally connected with said steering truck onvertical. axes and located in the rear of the pivotal connection betweenthe truck and the tractor frame, and a plow frame ointed directly to thesteering truck whereby the steering wheels will be held in engagementwith the ground by the suction of the plows and. the plows will becaused to follow the arc of the circle described by the tractor inturning curves.

6. In a traction plow, the combination with the tractor frame carryingthe engine, of a rear steering truck pivotally connected with thetractor frame on a vertical axis and a plow frame jointeddirectly to thesteering truck whereby the tendency of the steering truck to follow theare of. the circle described by the tractor in turning curves will betransmitted to the plow frame.

7. In a traction plow, the combination with the tractor frame carryingthe engine, of a steering device associated with the tractor frame, anda plow frame coupled directly to and in the rear of the steering device,and arranged so that the suction of the plows will assist the tractorframe in maintaining the ground support of the steering device inoperative contact with the surface of the ground.

8. In a plow structure having three articulated trucks adapted to assumelateral angu-- lar relations relatively to each other, the combinationwi'tha plow and its frame, of steer ing wheels and manually controlledsteering mechanism carried. by one of said vtrucks,

and means whereby the suction of the plow will be transmitted to thesteering wheels to keep them in normal contact with the surface of theground.

9. In a traction plow, the combination with the tractor frame carryingthe engine, a rear steering truck pivotally connected with the tractorframe, a plow frame flexibly connected with the steering truck, raisingand lowering mechanism carried by the plow frame, means for operatingsaid raising and lowering mechanism from the engine, including a driveshaft for the raising and lowering mechanism, extending through andsupported by the steering truck, and a manually controlled clutchintermediate said shaft and the raising and lowering mechanism of theplow frame.

10. In a traction plow, the combination cluding a drive shaft for theraising and lowering mechanism, extending through and supported by thesteering truck, and means operable from the steering truck forconnecting the shaft with and disconnecting it from the raising andlowering mechanism of the plow frame.

PLINY E. HOLT.

Witnesses:

F. G. HOLT, C. F. HOLT.

